{"title":"DIN 6921 Hex Flange Bolt Grade 10.9 ZINC YELLOW","description":"\u003ch1\u003eDIN 6921 Hex Flange Bolt — Grade 10.9 | Zinc Yellow | FULLERKREG\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 6921 Hex Flange Bolts are engineered for high-strength fastening in demanding automotive and new energy vehicle (NEV) applications. Manufactured at our Wuhu facility — located in the heart of China's automotive industry, home to Chery Automobile — these bolts meet the rigorous dimensional and mechanical requirements of DIN 6921 and DIN EN ISO 898-1.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e DIN 6921\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Hexagon Flange Bolt (with or without serration)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Alloy Steel 10B21\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProperty Class \/ Grade:\u003c\/strong\u003e 10.9 (per DIN EN ISO 898-1)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Zinc Yellow (Zinc Flake \/ Dacromet-equivalent yellow passivation)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e Metric coarse thread (ISO 68-1)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e FULLERKREG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturing Origin:\u003c\/strong\u003e Wuhu, Anhui, China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTwo Flange Head Types Available\u003c\/h2\u003e\n\n\u003ch3\u003e① Non-Serrated Flange (Smooth Flange)\u003c\/h3\u003e\n\u003cp\u003eThe standard DIN 6921 configuration. The flange underhead bearing surface is smooth, providing a large, even clamping area that distributes load across the joint. Ideal for applications where the mating surface must not be marred or where vibration resistance is achieved through other means (e.g., thread-locking compounds or prevailing torque nuts).\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmooth flange underside\u003c\/li\u003e\n  \u003cli\u003eLarger bearing area reduces surface pressure\u003c\/li\u003e\n  \u003cli\u003eSuitable for softer substrates and painted surfaces\u003c\/li\u003e\n  \u003cli\u003ePreferred in body panel and bracket assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e② Serrated Flange (Toothed Flange)\u003c\/h3\u003e\n\u003cp\u003eFeatures radial serrations on the flange underside that bite into the mating surface upon tightening, providing superior vibration and loosening resistance without additional locking elements. Widely used in powertrain, chassis, and battery pack assemblies where dynamic loads and vibration are constant.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIntegral serrated locking feature\u003c\/li\u003e\n  \u003cli\u003eExcellent resistance to vibration-induced loosening\u003c\/li\u003e\n  \u003cli\u003eEliminates need for separate lock washers\u003c\/li\u003e\n  \u003cli\u003ePreferred in drivetrain, motor mounts, and EV battery enclosures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial \u0026amp; Mechanical Properties\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eStandard Reference\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial\u003c\/td\u003e\n      \u003ctd\u003eAlloy Steel 10B21 (boron steel)\u003c\/td\u003e\n      \u003ctd\u003eDIN EN ISO 898-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProperty Class\u003c\/td\u003e\n      \u003ctd\u003e10.9\u003c\/td\u003e\n      \u003ctd\u003eDIN EN ISO 898-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eNominal Tensile Strength (Rm)\u003c\/td\u003e\n      \u003ctd\u003e≥ 1040 MPa\u003c\/td\u003e\n      \u003ctd\u003eDIN EN ISO 898-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProof Load Stress (Sp)\u003c\/td\u003e\n      \u003ctd\u003e940 MPa\u003c\/td\u003e\n      \u003ctd\u003eDIN EN ISO 898-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eYield Strength (Rp0.2)\u003c\/td\u003e\n      \u003ctd\u003e≥ 940 MPa\u003c\/td\u003e\n      \u003ctd\u003eDIN EN ISO 898-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHardness (Vickers)\u003c\/td\u003e\n      \u003ctd\u003e320 – 380 HV\u003c\/td\u003e\n      \u003ctd\u003eDIN EN ISO 898-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCore Hardness (Rockwell)\u003c\/td\u003e\n      \u003ctd\u003e33 – 39 HRC\u003c\/td\u003e\n      \u003ctd\u003eDIN EN ISO 898-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eElongation after fracture\u003c\/td\u003e\n      \u003ctd\u003e≥ 9%\u003c\/td\u003e\n      \u003ctd\u003eDIN EN ISO 898-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSurface Treatment\u003c\/td\u003e\n      \u003ctd\u003eZinc Yellow (yellow chromate \/ zinc flake)\u003c\/td\u003e\n      \u003ctd\u003eDIN 267-11\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCorrosion Resistance\u003c\/td\u003e\n      \u003ctd\u003e≥ 720 hours neutral salt spray (NSS)\u003c\/td\u003e\n      \u003ctd\u003eDIN 267-11 \/ ISO 9227\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Reference — DIN 6921 Key Parameters\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread Size\u003c\/th\u003e\n      \u003cth\u003ePitch (mm)\u003c\/th\u003e\n      \u003cth\u003eWidth Across Flats s (mm)\u003c\/th\u003e\n      \u003cth\u003eFlange Diameter dc (mm)\u003c\/th\u003e\n      \u003cth\u003eHead Height k (mm)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e14.2\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e17.0\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e22.0\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e15 \/ 16\u003c\/td\u003e\n\u003ctd\u003e27.0\u003c\/td\u003e\n\u003ctd\u003e6.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e1.75\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e32.0\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e21\u003c\/td\u003e\n\u003ctd\u003e37.0\u003c\/td\u003e\n\u003ctd\u003e9.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003ctd\u003e43.0\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e54.0\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eFull dimensional tables per DIN 6921. Custom lengths and thread pitches available upon request.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eSurface Treatment: Zinc Yellow\u003c\/h2\u003e\n\u003cp\u003eThe Zinc Yellow finish applied to FULLERKREG DIN 6921 bolts provides a dual function: corrosion protection and visual identification. Compliant with DIN 267-11 requirements for electroplated and zinc-flake coatings on fasteners.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Distinctive yellow \/ golden iridescent appearance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion Protection:\u003c\/strong\u003e ≥ 720 hours neutral salt spray (NSS) to first red rust\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Type:\u003c\/strong\u003e Zinc flake (Geomet \/ Dacromet equivalent) or zinc electroplate with yellow chromate passivation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoHS Compliant:\u003c\/strong\u003e Trivalent chromate process available (Cr³⁺, no hexavalent chromium)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHydrogen Embrittlement Risk:\u003c\/strong\u003e Minimized through controlled baking process post-plating (per DIN EN ISO 4042)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIdentification:\u003c\/strong\u003e Yellow color serves as a quick visual indicator for Grade 10.9 zinc-coated fasteners in assembly lines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003ePrimary Application Sectors\u003c\/h2\u003e\n\n\u003ch3\u003e🔋 New Energy Vehicles (NEV \/ EV)\u003c\/h3\u003e\n\u003cp\u003eFULLERKREG DIN 6921 Grade 10.9 Zinc Yellow bolts are widely specified in electric vehicle platforms for:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery pack enclosure and module assembly\u003c\/li\u003e\n  \u003cli\u003eElectric motor mounting and drive unit housings\u003c\/li\u003e\n  \u003cli\u003eHigh-voltage connector brackets and busbar fixings\u003c\/li\u003e\n  \u003cli\u003eThermal management system (TMS) component fastening\u003c\/li\u003e\n  \u003cli\u003eChassis and subframe structural joints\u003c\/li\u003e\n  \u003cli\u003eOnboard charger (OBC) and power electronics enclosures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🚗 Conventional Automotive \u0026amp; Commercial Vehicles\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEngine block and cylinder head peripheral fastening\u003c\/li\u003e\n  \u003cli\u003eTransmission housing and gearbox covers\u003c\/li\u003e\n  \u003cli\u003eSuspension components, control arms, and knuckles\u003c\/li\u003e\n  \u003cli\u003eBrake caliper and disc shield mounting\u003c\/li\u003e\n  \u003cli\u003eExhaust system heat shield fastening\u003c\/li\u003e\n  \u003cli\u003eBody-in-white (BIW) structural joints\u003c\/li\u003e\n  \u003cli\u003eSeat rail and safety restraint system anchoring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG DIN 6921 Bolts?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eAutomotive-Grade Manufacturing:\u003c\/strong\u003e Produced in Wuhu, Anhui — China's premier automotive manufacturing hub, co-located with Chery Automobile's global headquarters. Our facility benefits from decades of automotive supply chain expertise.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eStrict DIN Compliance:\u003c\/strong\u003e Every batch is manufactured and inspected to DIN 6921, DIN EN ISO 898-1, and DIN 267-11 standards.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFull Traceability:\u003c\/strong\u003e Material certificates (MTC), mechanical test reports, and coating inspection records available per shipment.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eHigh-Volume Capability:\u003c\/strong\u003e Suitable for OEM and Tier-1 supplier procurement with consistent lot-to-lot quality.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFlexible Specifications:\u003c\/strong\u003e Both serrated and non-serrated flange types stocked; custom lengths, thread pitches, and packaging available.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eRoHS \u0026amp; REACH Compliant:\u003c\/strong\u003e Surface treatment meets EU environmental directives for automotive exports.\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCompetitive Lead Times:\u003c\/strong\u003e Direct factory supply with efficient global logistics from Wuhu port access.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eApplicable Standards \u0026amp; References\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN 6921\u003c\/strong\u003e — Hexagon bolts with flange (metric coarse thread)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN EN ISO 898-1\u003c\/strong\u003e — Mechanical properties of fasteners: bolts, screws and studs (property class 10.9)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN 267-11\u003c\/strong\u003e — Fasteners: technical delivery conditions — electroplated coatings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO 9227\u003c\/strong\u003e — Corrosion tests in artificial atmospheres — salt spray tests\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN EN ISO 4042\u003c\/strong\u003e — Fasteners: electroplated coatings (hydrogen embrittlement relief)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eOrdering \u0026amp; Customization\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG supplies DIN 6921 Grade 10.9 Zinc Yellow bolts in standard and custom configurations. Please specify the following when placing an inquiry:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread diameter and pitch (e.g., M10 × 1.5)\u003c\/li\u003e\n  \u003cli\u003eNominal length (e.g., 30 mm, 50 mm)\u003c\/li\u003e\n  \u003cli\u003eFlange type: Non-Serrated or Serrated\u003c\/li\u003e\n  \u003cli\u003eRequired quantity and packaging (bulk \/ box \/ reel)\u003c\/li\u003e\n  \u003cli\u003eCertification requirements (PPAP, IATF 16949, etc.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eContact our technical sales team for datasheets, samples, and volume pricing.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cem\u003eFULLERKREG — Precision Fasteners for the Automotive Future. Manufactured in Wuhu, China.\u003c\/em\u003e\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/din-6921-hex-flange-bolt-grade-10-9-zinc-yellow.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}